package com.adong.springboot.component;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 拦截器,进行登录检查
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {
    /*
    执行之前检查
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object user = request.getSession().getAttribute("user");
        if (user == null) {
            //未登录就不放行
            request.setAttribute("msg", "没有权限,请登录");
            request.getRequestDispatcher("/index.html").forward(request, response);
            return false;
        } else {
            //登录就放心
            return true;
        }

    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
